A representative from the subcontractor, Edison Power, of Mesa, Ariz., reported the break to the city’s water plant about 2:30 a.m. Sunday. The city shut off the water, and the water main was fixed by 7 p.m., Johnson said.

FPL refused to identify the subcontractor, but the website for Edison Power says it is working for FPL in its hardening program, which is supposed to make the electrical system more resilient to storms.

A representative from Edison Power could not be reached for comment by phone or email Tuesday.

Last month, another FPL subcontractor, Florida Communication Concepts, of Wellington, drilled into a critical water main in Fort Lauderdale, leaving some 220,000 people without drinkable water. The subcontractor said it had clearance to dig where it did, but the city said Florida Communication Concepts gave an incorrect location.

Five businesses that lost thousands of dollars during the water shutdown are suing FPL and Florida Communication Concepts.